WM8146

Product Preview

WOLFSON MICROELECTRONICS LTD

PP Rev 1.1 January 2000

2

PIN CONFIGURATION

ORDERING INFORMATION

DEVICE

TEMP. RANGE

PACKAGE

XWM8146CDW/V

0 to 70

28-pin SOIC

SEN

OP[1]

OP[0]

SCK

SDI

DVDD2

OP[7]

OP[2]

OP[3]

OP[4]

OP[5]

OP[6]

GINP

AGND1

VRB

VRT

VMID

VRLC

BINP

AVDD

DGND

AGND2

DVDD1

OEB

VSMP

RLC

MCLK

RINP

WM8146

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

PIN DESCRIPTION

PIN

NAME

TYPE

DESCRIPTION

1

RINP

Analogue input

Red channel input video.

2

AGND2

Supply

Analogue ground (0V).

3

DVDD1

Supply

Digital supply (5V) for logic and clock generator. This must be operated at the same

potential as AVDD.

4

OEB

Digital input

Output Hi-Z control, all digital outputs disabled when OEB = 1.

5

VSMP

Digital input

Video sample synchronisation pulse.

6

RLC

Digital input

Selects reset level clamp on a pixel-by-pixel basis – active high. Tie high to use on

every pixel.

7

MCLK

Digital input

Master clock. This clock is applied at N times the input pixel rate (N = 2, 3, 6, 8 or

any multiple of 2 thereafter depending on input sample mode).

8

DGND

Supply

Digital ground (0V).

9

SEN

Digital input

Enables the serial interface when high.

10

DVDD2

Supply

Digital supply (5V/3.3V), all digital I/O pins.

11

SDI

Digital input

Serial interface data input.

12

SCK

Digital input

Serial interface clock.

13

OP[0]

Digital output

14

OP[1]

Digital output

15

OP[2]

Digital output

16

OP[3]

Digital output

17

OP[4]

Digital output

18

OP[5]

Digital output

19

OP[6]

Digital output

20

OP[7]

Digital output

Digital multiplexed output data bus.

OEB = 0: ADC output data is available in (8+4bit) multiplexed format on pins OP[7] to

OP[0]. See Operational Timing diagrams for details.

OEB = 1: Output is Hi=Z.

21

AVDD

Supply

Analogue supply (5V). This must be operated at the same potential as DVDD1.

22

AGND1

Supply

Analogue ground (0V).

23

VRB

Analogue output

Lower reference point of ADC reference string

This pin must be connected to AGND via a decoupling capacitor.

24

VRT

Analogue output

Upper reference point of ADC reference string

This pin must be connected to AGND via a decoupling capacitor.

25

VMID

Analogue output

Buffered mid-point of ADC reference string

This pin must be connected to AGND via a decoupling capacitor.

26

VRLC

Analogue output

Selectable analogue output voltage for RLC.

This pin must be connected to AGND via a decoupling capacitor.

27

BINP

Analogue input

Blue channel input video.

28

GINP

Analogue input

Green channel input video.